Pipe fittings are a perfect solution for providing connections for pipelines. Additionally, they can modify pipeline systems by extending the run or altering the pipe flow direction. Various pipe fittings exist for different applications and industries, including water supply, pharmaceuticals, power generation, petrochemicals, pulp & paper, and others. Pipe fittings for water supply come in multiple materials, types, shapes, and sizes. Hawle offers a wide range of mechanical pipe fittings for the most common types of pipes used in the water supply. Prior to selecting the ideal pipe fitting for your application, you should base your decision on certain criteria to assure its compatibility.
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Flanged pipe fittings are a prevalent type of pipe fittings. They connect piping system equipment such as pipes, valves, and pumps by being screwed together. When two flanges are bolted together, and a gasket forms a seal between them, the result is a flanged junction.
The selection of the type of flanged fitting depends on the system and application, where temperature and pressure are important factors. Flanged pipe fittings are often employed in water supply networks and are compatible with most common pipe types. They are simple to use, universal, and great for rigid pipelines, given they fit in tight spaces. Moreover, their maintenance is simple as it is easy to disconnect and reconnect them. However, note that flanged pipe fittings require bolts and are prone to leakage. Hawle offers a vast range of flanged pipe fittings to fit your need.
System connections are unique mechanical pipe fittings designed to attach water pipes made of plastic, such as HDPE/PE/PEX and OPVC/PVC.
There are still many pipes older than a century in several European cities that need to be replaced because of significant leakage rates. When these pipes fail, they are frequently replaced by PE and PVC pipes, as they offer lower failure rates than other materials. To meet this need, Hawle offers System pipe connections that are perfect for plastic pipes. System pipe connections are attached to the pipes using a brass grip ring with teeth elements, providing a restraint connection for plastic pipes.
Compared to other pipe laying technologies like PE-welding, for the System installation, no special tools or machinery or specially trained personnel are needed. Cold, rainy weather or groundwater in the pit also do not affect the fast and safe System assembly. In addition to that, Hawle has a certificate from an external independent institution ”100 Years Expected Lifetime”.
Among other valve manufacturers of comparable mechanical connections for PE pipes, Hawle offers one of the broadest product pallets with System : Pipe connections, bends, couplings, end caps, combi- and gate valves, suited for all types of installations are all part of the Hawle System offering. System diameters might be as little as d63 or as large as d630, depending on the product.
Most old water pipelines are built using cast iron, concrete, or asbestos cement. Retrofitting these old pipes with lighter and more flexible plastic components is common. However, properly connecting more recent plastic pipes to older concrete and metal ones might be difficult due to size and coupling incompatibilities. Synoflex range facilities this operation easily thanks to its high tolerance and multirange restraint couplings which were exclusively designed to join incompatible pipes. Hawle Synoflex multirange restraint joints can join a wide range of unique pipe combinations, such as:
Hawle Synoflex multirange restraint joints also enable metal – metal or plastic – plastic combinations. Some of the advantages of Synoflex connections include:
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Synoflex provides various pipe connections to meet a vast range of needs. These include the Synoflex couplings, Synfolex flange adapter, Syno connector, and SynoZAK adapters. However, it is worth noting that Synoflex is only available up to DN 400.
Hawle has a broad palette of pipe fittings for house connections up to 2", offering a versatile range of fittings to suit your needs. These include non-threaded pipe fittings, including push-fit fittings, Hawle ZAK connections and and conventional threaded pipe fittings. Pipe push fittings are becoming increasingly popular compared to conventional fittings as they are much faster to install without needing specialized equipment, saving time and money.
Hawle ISO pipe fittings made of ductile iron (with an epoxy powder coating) or polyoxymethylene (POM) are suitable for PE pipes according to EN -2 and DIN , up to PN 16. The Hawle ISO pipe fitting is the ideal push connection for PE pipes that have been tried and tested for decades. The joint is flexible, making the installation of the fitting quick and straightforward. Similar to the Hawle-FIT series, ISO fittings are available in various types: with external and internal thread, connector, elbow 45°- 90°, T-piece, end stop, wall inlet fitting, etc. By using the new 2-K gripring the ISO fittings can be used for PVC pipes acc. to EN ISO -2.
ZAK connections are threadless, restraint-joining systems for service connections. The bayonet-style connection of the ZAK-system is simple and fast, meaning service line connections can be made or removed in seconds. The ZAK-system saves time and does not require separate sealing products to make 100% leak-proof connections. Made from high-quality castings in Europe, ZAK-system fittings are made of GJS-400-15 ductile iron and coated inside and out with a durable epoxy powder coating.
To ensure its safety for distribution, fittings used in the water supply must meet the standards set by European Authorities. These include the drinking water certification, for example, from the Austrian and German Associations for Gas and Water (ÖVGW and DVGW, respectively. Protecting human health and the environment is a top priority at Hawle. Most fittings on the Hawle portfolio are designed for municipal water supply. This means that parts in contact with drinking water are certified and lead-free to ensure their safety for human health and the environment.
T-fittings, or pipe tee fittings are fittings that are used to connect two or more pipes. These fittings, characterized by their T-shaped form, attach the two pipes at a 90-degree angle. Among all pipe fittings and connectors, the T-fitting is one of the most adaptable and is frequently used in domestic, industrial, and commercial settings. Hawle offers various T-fittings made of different materials, also available in the Hawle-FIT and ISO-fittings series.
Similarly, a cross fitting is a pipe fitting with four openings in four directions used to connect four pipes. The pipe cross may have one inlet and three outlets or vice versa. In addition, the inlet and outlet diameters may be the same or different.
In water systems involving the underground piping of water to domestic or to industrial areas, there is the need to bring a water supply to the surface at various strategic locations. Duck foot bends are often employed to connect fire hydrants away from or at the end of a pipeline. A duck foot bend fitting consists of two ends, where one end is vertical and the other is curved. In a fire hydrant application, the vertical end is connected to the bottom of the hydrant while the other end is often connected to a pipeline at a recommended depth below the ground.
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